Some customers who updated to Lightroom 5.4.0 on iPhone and iPad may be missing photos and/or presets. This affected customers using Lightroom mobile without a subscription to the Adobe cloud. It also affected Lightroom cloud customers with photos and presets that had not yet synced to the Adobe cloud.

Note:

No assets in the Lightroom cloud were lost or are at risk. Lightroom mobile on Android, Lightroom desktop on macOS and Windows, as well as Lightroom Classic are not affected.

A new version of Lightroom mobile (5.4.1) for iOS and iPadOS has now been released that prevents this issue from affecting additional customers. 

Installing version 5.4.1 will not restore missing photos or presets for customers affected by the problem introduced in 5.4.0.

We know that some customers have photos and presets that are not recoverable. We know how frustrating and upsetting this will be to people affected and we sincerely apologize.

Some customers affected by this issue might be able to use iPhone and iPad backups to recover photos and presets. If you are affected by this issue, please refer to the information in our forum.